Place the toilet tank lid off to the side so it does not get in your way while you are doing the toilet bowl repairs. Now you should flush the toilet with the water being off so the toilet tank empties and you can work on the toilet chain and the flapper. You first will want to remove the chain from the toilet handle.
Definition of vat. 1  1 : a large vessel (such as a cistern, tub, or barrel) especially for holding liquors in an immature state or preparations for dyeing or tanning.
In other words, it is the difference between total output tax and total input tax. Here input tax refers to a tax on inputs, i.e. local purchases made from a registered dealer whereas output tax means a tax on outputs i.e. tax on sales made within the state. VAT is an acronym used for Value Added Tax.